toto.go

package main

func fact(i int) int {
  var aux func(int, int) int
  aux = func(k int, acc int) int {
    if(k == 0) {
      return acc
    } else {
      return aux(k - 1, k * acc)
    }
  }
  return aux(i, 1)
}

func main() {
  println(fact(19))
}